<template>
    <div>
      <!--  面包屑导航栏-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!--  卡片视图-->
      <el-card>
<!--        添加角色按钮区域-->
        <el-row>
          <el-col>
           <el-button type="primary">添加角色</el-button>
         </el-col>
        </el-row>
        <el-table :data="rolesList" border stripe>
<!--          展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
<!--              <pre>-->
<!--                {{scope.row}}-->
<!--              </pre>-->
              <el-row v-for="(item1, i1) in scope.row.children" :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" :key="item1.id">
 <!--              渲染一级权限-->
                <el-col  :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
 <!--              渲染二级权限和三级权限-->
                <el-col :span="19">
<!--                  通过for循环嵌套渲染二级权限-->
                  <el-row v-for="(item2, i2) in item1.children" :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" :key="item2.id">
                    <el-col  :span="5">
                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <!--                  通过for循环嵌套渲染三级权限-->
                          <el-tag v-for="(item3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                        </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色权限" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" >
            <template slot-scope="scope" width="300px">
              <!--          修改按钮-->
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
              <!--          删除按钮-->
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)">删除</el-button>
              <!--          分配角色权限按钮-->
                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

<!--      分配权限的对话框-->
      <el-dialog
        title="分配权限"
        :visible.sync="showSetRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <el-tree :data="rightslist" :props="treeProps" ref="treeRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="dekeys"></el-tree>
        <span slot="footer" class="dialog-footer">
    <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所以角色列表数据
      rolesList: [],
      // 控制分配权限对话框的显示与隐藏
      showSetRightDialogVisible: false,
      // 所以数据的权限
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值
      dekeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    // 获取所以的权限
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败！')
      }
      this.rolesList = res.data
      console.log(res)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      console.log(role, rightId)
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => {
        return err
      })
      // 如果用户确定删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      //  console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      // console.log('确认删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      role.children = res.data
      this.getRolesList()
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id

      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      console.log(res)
      this.rightslist = res.data
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.dekeys)
      this.showSetRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所以三级权限的id，并保存到dekeys数组中
    getLeafKeys (node, arr) {
      //  如果当前node节点不包含children属性，这是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.dekeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        // ...展开运算符
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      console.log(idStr)
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.showSetRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
  .bdtop{
  border-top: 1px solid lightgray;
  }
.bdbottom{
  border-bottom: 1px solid lightgray;
}
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
